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Multicopters are becoming increasingly important in both civil and militaryfields. Currently, most multicopter propulsion systems are designed byexperience and trial-and-error experiments, which are costly and ineffective.This paper proposes a simple and practical method to help designers find theoptimal propulsion system according to the given design requirements. First,the modeling methods for four basic components of the propulsion systemincluding propellers, motors, electric speed controls, and batteries arestudied respectively. Secondly, the whole optimization design problem issimplified and decoupled into several sub-problems. By solving thesesub-problems, the optimal parameters of each component can be obtainedrespectively. Finally, based on the obtained optimal component parameters, theoptimal product of each component can be quickly located and determined fromthe corresponding database. Experiments and statistical analyses demonstratethe effectiveness of the proposed method.

An Analytical Design Optimization Method for Electric Propulsion Systems of Multicopter UAVs with Desired Hovering Endurance